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  1. C

    CCD/Constant Current Diode!

    So i went looking for a CCD and found little so i had look to see what one was! Funny looking diode lol
  2. C

    Need to build an interface between an audiometer and a set of LED lights

    To be honest, an arduino board (or mini version with usb) And then a bit of code to read voltage and act accordingly ...
  3. C

    Battery charger question

    Easier to buy a 2nd 12v battery and charge in series, this uses a microprocessor apparently so you'd have to change the resistor dividers, among many other things
  4. C

    555 timer circuit help?

    I see several mistakes.... I see only 1 resistor, you're missing 1, you also have a low ceramic value prob under 1uf, no problem though, with large enough resistance, also you made the curcuit difficult to build, use the rails at the top and bottom (if you have hookup wire) Lastly although not...
  5. C

    Limiting inrush current without power loss?

    Well yeah, precisely.... the fuse will heat up reducing current, once the inrush is over the polyfuse cools down supplying more current
  6. C

    Limiting inrush current without power loss?

    Maybe not the best solution but adding a poly fuse should do the job
  7. C

    Unknown Part

    My bet is it's a heating element. ..
  8. C

    passive WIFI

    I'm not sure about how this works, if it can receive a packet then it's oscillating at the righf frequency? What's the analog circuit required for in the first place?
  9. C

    How Do I regulate 3v DC?

    Read up on the difference between Parallel and Series befores you continue
  10. C

    How Do I regulate 3v DC?

    Sounds like you blew the fuse in the meter.. If it has a 10amp range, you have to pull one of the probes move it to another socket, set in ma, did you try to measure the current by touching positive and negative? If so, no ... connect the negative of the battery, the negative pushed against...
  11. C

    Adding a Diode or Two?

    A 1k resistor across the output has worked for me...
  12. C

    car power circuit thingy

    Everything should share the same ground yeah.. There has to be a current limiter or what will hapen is the mc will max out getting hot, the current simply passes from the base to emitter, use a 500 - 1k ohm on base...
  13. C

    Novice designing circuits

    I think you're undercharging...
  14. C

    car power circuit thingy

    Inition signal in.... ah ok you step it down to 5v Is this a 5v relay? If it's 12, it's only going to see 5v, it might struggle to energize You're not far off ... you need a resistor on the base of the transistor or you'll risk cooking your micro controller, you could also do with smoothing caps
  15. C

    thyristor vs triac

    À SIlicon Controlled Rectifier (SCR) is going back to William Shockleys 4? Layer diode is a general group of transistors but a thyristor and triac are not the same thing even though they're both SCRs
  16. C

    Craig's battery saver for Android!

    Well, Android is infamous for battery drain so i wrote an automatic deep sleep which supports all hardware services on Android.. To use, simply run, select what kind of wakup checks then hit start! For example you go to work use the phone for a few minutes here and there but still you need...
  17. C

    Don't build this seemingly simple 12V to mains inverter circuit

    Well, that's what a MOV is for to shunt unwanted voltage, driving sensitive stuff is a no go but... power tools, lights it's better than darkness in an emergency
  18. C

    How Do I regulate 3v DC?

    It's normal for the voltage to drop like that under heavy current draw, but these tshirts run on aaa's so i can't imagine it being more than the adapter So maybe your adapter is faulty or the tshirt is causing a short? Ideally you need to measure the current draw with a multimeter
  19. C

    how pir sensor works?

    Blinking... are you saying it goes on and off every second? Or it goes on, stops for a brief moment then goes on again?
  20. C

    How Do I regulate 3v DC?

    What is? What's the current load? Can't see what you can....
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